2012 INTERNATIONAL BUILDING CODE HANDBOOK

2012 INTERNATIONAL BUILDING CODE?

HANDBOOK

About the Authors

Douglas W. Thornburg, AIA, is the Vice President and Technical Director of Product Development and Education, where he provides leadership in the technical development and positioning of support products, educational activities, and certification programs for the Code Council (ICC). Prior to joining the ICC in 2004, Mr. Thornburg served as a code consultant and educator for building codes. He has been involved extensively in building code activities since 1980.

John R. Henry, P.E., is the Principal Staff Engineer with the International Code Council (ICC) and has been with the association since 1997. During his tenure with ICC, he has worked for the code development department, technical services, government relations, training and education, and product development. Mr. Henry is currently responsible for the research, development, and authoring of technical resources related to the structural engineering provisions of the IBC and IRC and is an instructor of structural and framing seminars for the Code Council.

About the International Code Council

The International Code Council? (ICC?) is a member-focused association dedicated to helping the building safety community and construction industry provide safe, sustainable and affordable construction through the development of codes and standards used in the design, build and compliance process. Most U.S. communities and many global markets choose the International Codes. ICC Evaluation Service (ICC-ES), a subsidiary of the International Code Council, has been the industry leader in performing technical evaluations for code compliance fostering safe and sustainable design and construction.

Headquarters: 500 New Jersey Avenue, NW, 6th Floor, Washington, DC 20001-2070 District Offices: Birmingham, AL; Chicago. IL; Los Angeles, CA 1-888-422-7233

2012 INTERNATIONAL BUILDING CODE? HANDBOOK

Douglas W. Thornburg, AIA | John R. Henry, P.E.

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2012 International Building Code? Handbook

Copyright ? 2013 by the International Code Council. All rights reserved. Printed in the United States of America. Except as permitted under the United States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a data base or retrieval system, without the prior written permission of the publisher.

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Information contained in this work has been obtained by McGraw-Hill Education, LLC from sources believed to be reliable. However, neither McGraw-Hill Education, the International Code Council, nor its authors guarantee the accuracy or completeness of any information published herein, and neither McGraw-Hill Education nor its authors shall be responsible for any errors, omissions, or damages arising out of use of this information. This work is published with the understanding that McGraw-Hill Education and its authors are supplying information but are not attempting to render engineering or other professional services. If such services are required, the assistance of an appropriate professional should be sought.

Dedication

This book is dedicated to the memory of the late James E. Bihr, P.E., past chief executive officer of the International Conference of Building Officials (one of the three legacy founding members of the International Code Council) and past chairman of the board of directors of ASTM International (formerly the American Society of Testing and Materials). Mr. Bihr provided tremendous vision and leadership in various roles during his long and distinguished career. His integrity, professionalism, and compassion provided support and inspiration to the authors as well as so many others.

2012 International Building Code Handbook

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Online Bonus Resources

Enhance Your 2012 IBC Handbook Reading Experience. The 2012 International Building Code? Handbook includes a variety of helpful bonus resources just right for you. These online bonus resources are designed to enhance your expertise and knowledge of various building code provisions, including:

? FEMA/NEHRP/NIST Publications related to earthquake safety and seismic design

? Articles by expert engineers on changes to the latest structural material standards ? ATC Wind Speed site provides site specific wind speeds for use with ASCE 7-10 ? ICC Guidelines for acoustics and commissioning ? Helpful Articles from ICC's Building Safety Journal ? Helpful ICC YouTube Videos on various code related topics ? Resources related to accessible means of egress and fire protection

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2012 International Building Code Handbook

Contents

Foreword. . . . . . . . . . . . . . . . . . . . . . xv

Preface. . . . . . . . . . . . . . . . . . . . . . . xvii

Acknowledgments. . . . . . . . . . . . . . . . xix

Chapter 1 Scope and Administration . . . . . . . . . . . . . . 1

Section 101 General. . . . . . . . . . . . . . . . . 2 Section 102 Applicability . . . . . . . . . . . . . 4 Section 103Department of

Building Safety. . . . . . . . . . . 5 Section 104Duties and Powers of

Building Official . . . . . . . . . . 6 Section 105 Permits. . . . . . . . . . . . . . . . . 9 Section 107 Submittal Documents. . . . . 11 Section 108Temporary Structures

and Uses. . . . . . . . . . . . . . . 12 Section 109 Fees . . . . . . . . . . . . . . . . . . 12 Section 110 Inspections. . . . . . . . . . . . . 13 Section 111Certificate of Occupancy. . . 14 Section 112 Service Utilities. . . . . . . . . . 15 Section 113 Board of Appeals. . . . . . . . . 15 Section 114 Violations . . . . . . . . . . . . . . 15 Section 115 Stop Work Order. . . . . . . . . 16 Section 116Unsafe Structures

and Equipment. . . . . . . . . . 17 KEY POINTS . . . . . . . . . . . . . . . . . . . . . . . 17

Chapter 2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . 19

Section 201 General. . . . . . . . . . . . . . . . 20 Section 202 Definitions . . . . . . . . . . . . . 20 KEY POINTS . . . . . . . . . . . . . . . . . . . . . . . 45

Chapter 3 Use and Occupancy Classification. . . . . . . 47

Section 302 Classification . . . . . . . . . . . 48 Section 303 Assembly Group A. . . . . . . . 50 Section 304 Business Group B. . . . . . . . 54 Section 305 Educational Group E. . . . . . 55 Section 306 Factory Group F . . . . . . . . . 56 Section 307 High-Hazard Group H. . . . . 57 Section 308 Institutional Group I. . . . . . 63

Section 309 Mercantile Group M . . . . . . 65 Section 310 Residential Group R . . . . . . 66 Section 311 Storage Group S. . . . . . . . . 68 Section 312Utility and Miscellaneous

Group U . . . . . . . . . . . . . . . 69 KEY POINTS . . . . . . . . . . . . . . . . . . . . . . . 69

Chapter 4 Special Detailed Requirements Based on Use and Occupancy . . . . . . . . . . 71

Section 402Covered Mall and Open Mall Buildings. . . . . . 72

Section 403 High-Rise Buildings. . . . . . . 81 Section 404 Atriums . . . . . . . . . . . . . . . 88 Section 405 Underground Buildings. . . . 90 Section 406Motor-VehicleRelated

Occupancies. . . . . . . . . . . . 92 Section 407 Group I-2 . . . . . . . . . . . . . . 96 Section 408 Group I-3 . . . . . . . . . . . . . 100 Section 409Motion-Picture

Projection Rooms. . . . . . . . 101 Section 410Stages, Platforms, and

Technical Production Areas . . . . . . . . . . . . . . . . 101 Section 411Special Amusement Buildings . . . . . . . . . . . . . 104 Section 412Aircraft-Related Occupancies. . . . . . . . . . . 105 Section 413 Combustible Storage. . . . . 106 Section 414 Hazardous Materials. . . . . 107 Section 415Groups H-1, H-2, H-3, H-4, and H-5. . . . . . . 110 Section 416Application of Flammable Finishes . . . . . 114 Section 417 Drying Rooms. . . . . . . . . . 114 Section 418 Organic Coatings. . . . . . . . 114 Section 419 Live/Work Units . . . . . . . . 115 Section 420Groups I-1, R-1, R-2, and R-3. . . . . . . . . . . 116 Section 422Ambulatory Care Facilities. . . . . . . . . . . . . . 117 Section 423 Storm Shelters . . . . . . . . . 119 Section 424Children's Play Structures. . . . . . . . . . . . . 119 KEY POINTS . . . . . . . . . . . . . . . . . . . . . . 120

2012 International Building Code Handbook

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Contents

Chapter 5 General Building Heights and Areas. . . . . 123

Section 501 General. . . . . . . . . . . . . . . 124 Section 503General Building Height

and Area Limitations. . . . . 124 Section 504 Building Height. . . . . . . . . 128 Section 505Mezzanines and

Equipment Platforms. . . . . 130 Section 506Building Area

Modifications. . . . . . . . . . . 135 Section 507Unlimited-Area

Buildings . . . . . . . . . . . . . 148 Section 508Mixed Use

and Occupancy. . . . . . . . . 155 Section 509 Incidental Uses. . . . . . . . . 165 Section 510 Special Provisions. . . . . . . 168 KEY POINTS . . . . . . . . . . . . . . . . . . . . . 172

Chapter 6 Types of Construction . . . . . . . . . . . . . . . 175

Section 602Construction Classification . . . . . . . . . . 176

Section 603Combustible Material in Type I and II Construction. . . . . . . . . . . 186

KEY POINTS . . . . . . . . . . . . . . . . . . . . . 188

Section 718 Concealed Spaces. . . . . . . 260 Section 719Fire-Resistance

Requirements for Plaster. . . . . . . . . . . . . 266 Section 720Thermal- and Sound-Insulating Materials. . . . . . . . . . . . . . 266 Section 721Prescriptive Fire Resistance. . . . . . . . . . . . . 266 Section 722Calculated Fire Resistance. . . . . . . . . . . . . 270 KEY POINTS . . . . . . . . . . . . . . . . . . . . . 272

Chapter 8 Interior Finishes. . . . . . . . . . . . . . . . . . . . 275

Section 801 General. . . . . . . . . . . . . . . 276 Section 803Wall and Ceiling

Finishes . . . . . . . . . . . . . . 276 Section 804Interior Floor

Finish. . . . . . . . . . . . . . . . 279 Section 805Combustible Materials

in Types I and II Construction. . . . . . . . . . . 280 Section 806Decorative Materials and Trim. . . . . . . . . . . . . . 281 KEY POINTS . . . . . . . . . . . . . . . . . . . . . 281

Chapter 7 Fire and Smoke Protection Features. . . . . 189

Section 703Fire-Resistance Ratings and Fire Tests. . . . . . . . . . 190

Section 704Fire-Resistance Rating of Structural Members . . . 197

Section 705 Exterior Walls. . . . . . . . . . 201 Section 706 Fire Walls . . . . . . . . . . . . . 215 Section 707 Fire Barriers. . . . . . . . . . . 226 Section 708 Fire Partitions. . . . . . . . . . 228 Section 709 Smoke Barriers. . . . . . . . . 231 Section 710 Smoke Partitions . . . . . . . 232 Section 711 Horizontal Assemblies. . . . 232 Section 712 Vertical Openings . . . . . . . 235 Section 713 Shaft Enclosures. . . . . . . . 237 Section 714 Penetrations . . . . . . . . . . . 241 Section 715 Joint Systems. . . . . . . . . . 249 Section 716 Opening Protectives. . . . . . 250 Section 717Ducts and Air Transfer

Openings. . . . . . . . . . . . . . 255

Chapter 9 Fire Protection Systems . . . . . . . . . . . . . . 283

Section 901 General. . . . . . . . . . . . . . . 284 Section 903Automatic Sprinkler

Systems . . . . . . . . . . . . . . 286 Section 904Alternative Automatic

Fire-Extinguishing Systems . . . . . . . . . . . . . . 304 Section 905 Standpipe Systems. . . . . . 305 Section 907Fire Alarm and Detection Systems. . . . . . . 310 Section 908Emergency Alarm Systems . . . . . . . . . . . . . . 317 Section 909Smoke-Control Systems. . . . . . . . . . . . . . . 317 Section 910 Smoke and Heat Vents . . . 320 Section 911Fire Command Center. . . . . . . . . . . . . . . . 322 Section 914Emergency Responder Safety Features. . . . . . . . . 322 KEY POINTS . . . . . . . . . . . . . . . . . . . . . 323

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